ARTICLE
25 October 2024

Expert Opinion In International Arbitration – All You Need To Know

RP
Rubert & Partners

Contributor

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Expert opinion in international arbitration is often pivotal in resolving complex disputes that require specialized knowledge beyond the tribunal's expertise.
United Arab Emirates Litigation, Mediation & Arbitration

Expert Opinion in International Arbitration

Expert opinion in international arbitration is often pivotal in resolving complex disputes that require specialized knowledge beyond the tribunal's expertise. Whether the issue involves technical matters, financial evaluations, or industry-specific standards, the testimony and reports of expert witnesses can significantly shape the outcome of a case. Experts help clarify technical details, interpret data, and provide insights that are essential for informed decision-making by arbitrators.

Given their importance, it is crucial to understand how expert opinions are handled in arbitration, the different types of experts involved, and the key legal and procedural considerations that can impact their effectiveness and credibility. This overview explores the various facets of expert involvement in international arbitration, including the types of experts, their roles, and how their testimony is evaluated by tribunals.

Types of Experts

Party-Appointed Experts

In international arbitration, it is common for each party to appoint its own expert to support its case. Party-appointed experts prepare reports and provide testimony that is intended to bolster the appointing party's arguments. The downside is that their independence can sometimes be questioned, especially if they appear overly aligned with one party's position.

These experts are deeply familiar with the party's case and can tailor their opinions to support specific legal arguments.

Since each side typically presents its own experts, the arbitral tribunal must often evaluate contradictory expert reports and testimony.

Tribunal-Appointed Experts

In some cases, the tribunal may decide to appoint an independent expert to ensure neutrality. The tribunal-appointed expert's role is to provide an unbiased opinion on highly technical matters.

This approach is often seen as more impartial but can be costly and may delay proceedings, as both parties will typically engage in discussions about the expert's selection and review the expert's findings.

Expert Witnesses vs. Expert Advisors

Expert witnesses provide testimony during the arbitration process, either in written or oral form, based on their specialized knowledge.

Expert advisors often work behind the scenes, assisting the legal team in understanding technical issues and helping shape the overall strategy without formally testifying.

Expert's Role

Expert witnesses are critical in matters involving specialized industries, such as construction disputes, intellectual property, energy, or finance. Their role is to assist the tribunal in understanding complex issues that go beyond the general legal knowledge of the arbitrators.

Experts can provide factual evidence (e.g., presenting data and documents) as well as opinion evidence, explaining how they interpret the facts and what conclusions they draw based on their expertise.

Party-appointed experts face the tension of advocating for the party that has retained them while maintaining credibility through neutrality and objective analysis. If the tribunal perceives that an expert is biased, their testimony may carry less weight.

Independence and Impartiality in Expert Opinion in International Arbitration

Independence is a hallmark of credible expert testimony. Experts are often required to declare that they are acting independently of the parties and have no vested interest in the outcome of the case.

Even though party-appointed experts can be perceived as aligned with the appointing party, the rules governing international arbitration (such as those of the International Chamber of Commerce (ICC), London Court of International Arbitration (LCIA) or Dubai International Arbitration Centre (DIAC)) often require experts to disclose any potential conflicts of interest, which could impair their independence.

In practice, the tribunal carefully evaluates the objectivity of the expert. The more impartial an expert appears, the more weight their opinion is likely to carry.

The Reports of Expert Opinion in International Arbitration

A typical expert report includes a formal statement of the expert's qualifications, followed by a factual background of the issues they are analyzing. The expert then presents their methodology, explains the evidence they relied on, and concludes with their professional opinions.

The expert must lay out their assumptions clearly so that the tribunal and opposing party can understand the basis of their conclusions. If an expert's assumptions are proven incorrect, this could undermine their entire opinion.

Experts are expected to present their findings in a manner that is understandable to non-experts, including the tribunal. Highly technical language or jargon can hinder the tribunal's ability to assess the testimony.

Expert reports must meet certain standards of relevance and reliability to be admissible. For example, under UNCITRAL rules, evidence that is irrelevant, immaterial, or cumulative can be excluded, which applies to expert opinions as well.

Cross-Examination of Experts

Cross-examination is a key mechanism for testing the credibility, expertise, and impartiality of the expert. Opposing counsel will typically challenge:

  • The expert's qualifications.
  • The assumptions and data they relied on.
  • The soundness of their methodology.
  • Any biases or conflicts of interest.

The purpose is to expose weaknesses in the expert's report or testimony. A strong expert must be able to defend their findings while maintaining an appearance of neutrality under cross-examination.

In some arbitrations, experts may be directly questioned by arbitrators, who might probe into technical aspects or request clarification.

Joint Expert Conferences (Hot-Tubbing)

This practice involves both parties' experts testifying simultaneously in front of the tribunal. They engage in a moderated discussion where they can compare and contrast their opinions in real-time.

This method allows the tribunal to directly observe the interactions between experts and can lead to a more transparent, collaborative process. It also helps identify key areas of agreement and disagreement, potentially narrowing the issues.

There's a risk that one expert may dominate the conversation, or the discussion may become too technical for the tribunal to follow effectively.

Legal Standards for Expert Evidence

Different arbitration rules set varying standards for the use of expert evidence. Some key rules include:

ICC Rules: These rules grant the arbitral tribunal broad discretion to decide how expert evidence is handled, including the authority to appoint experts, instruct them, and determine the admissibility of their reports.

UNCITRAL Arbitration Rules: These rules emphasize the tribunal's authority to decide on the relevance and admissibility of expert testimony. Under UNCITRAL, tribunals can exclude irrelevant or unnecessary expert opinions.

DIAC Rules, Article 27(1) of the DIAC Rules gives the tribunal the power to appoint one or more independent experts to report on specific issues that require specialized knowledge. This can include technical, financial, or other complex matters. The tribunal can appoint an expert on its own initiative or at the request of one of the parties. The appointment is made after consultation with the parties, ensuring transparency.

Cost Considerations when selecting Expert Opinion in International Arbitration

Engaging experts can be costly, especially in high-stakes international arbitration. The costs associated with expert reports, travel, and testimony can escalate, particularly if the experts need to conduct extensive research or analysis.

The parties must consider whether the potential benefits of expert testimony (i.e., persuading the tribunal on a crucial technical issue) outweigh the financial burden. In some cases, a tribunal-appointed expert may be more cost-effective, but this is not always the case.

Tribunal's Discretion

When both parties submit expert reports, the tribunal must weigh the credibility of the opinions presented. Factors influencing this evaluation include the expert's qualifications, the methodology used, the expert's impartiality, and the overall clarity of the report.

The tribunal is not obligated to accept an expert's opinion, even if it is uncontested. If the tribunal finds the expert's conclusions to be based on incorrect assumptions, flawed reasoning, or speculative analysis, they may disregard the expert's testimony in whole or in part.

Expert testimony often plays a critical role in the tribunal's final decision, especially in complex cases involving technical, financial, or scientific issues. The findings of an expert may significantly influence the outcome of the award, particularly in disputes over damages or causation.

Conclusion to Expert Opinion in International Arbitration

Expert opinions in international arbitration can be decisive, particularly in disputes involving technical or specialized issues. Understanding how to effectively use experts, whether appointed by the party or the tribunal, and ensuring that the expert's report is clear, impartial, and methodologically sound, is essential for a successful arbitration strategy.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

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